Split an AUTHORS entry in two

An email pattern like *@*foo.bar matches unintended addresses such as
bla@foofoo.bar. Split it into *@foo.bar and *@*.foo.bar instead.
This corresponds to what is done in chromium's AUTHORS file.

Change-Id: I2f463fbc41cfcfced1151542f64d054dbe85e563
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1581642Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61006}

AUTHORS

@@ -22,7 +22,8 @@ Wave Computing, Inc. <*@wavecomp.com>
 Loongson Technology Corporation Limited <*@loongson.cn>
 Code Aurora Forum <*@codeaurora.org>
 Home Jinni Inc. <*@homejinni.com>
-IBM Inc. <*@*ibm.com>
+IBM Inc. <*@*.ibm.com>
+IBM Inc. <*@ibm.com>
 Samsung <*@*.samsung.com>
 Joyent, Inc <*@joyent.com>
 RT-RK Computer Based System <*@rt-rk.com>